阅读说明：本技术 一种用于封堵工艺孔的压涨式液压堵头 (Pressure expansion type hydraulic plug for plugging fabrication hole ) 是由 辛华伟 张晶晶 杨建旭 徐洪亮 严孝斌 曹雄辉 施建伟 孙亮 于 2020-11-18 设计创作，主要内容包括：一种用于封堵工艺孔的压涨式液压堵头,旨在解决堵头筒连接不稳定,且容易出现密封失效的问题。其技术方案要点是：包括工艺孔和堵头本体,堵头本体包括套筒和压块,套筒的外围设有若干环形槽齿,套筒的一端开设有用于插入压块的膨胀孔,压块与膨胀孔过盈配合,压块的各侧外壁均分别与膨胀孔的各侧内孔壁贴合,压块上开设有排气孔。本发明的压块压入膨胀孔中时,压块的各侧外壁均分别与膨胀孔的各侧内孔壁贴合,一方面提升了压块与套筒之间的连接稳定性,另一方面套筒的筒壁被完全撑开,套筒上的所有环形槽齿完全压嵌入到工艺孔的孔壁内,大大的增加了其整体的密封效果和固定强度。(A pressure expansion type hydraulic plug for plugging a fabrication hole aims to solve the problems that a plug cylinder is unstable in connection and sealing failure is easy to occur. The key points of the technical scheme are as follows: including fabrication hole and end cap body, the end cap body includes sleeve and briquetting, and telescopic periphery is equipped with a plurality of annular groove teeth, and telescopic one end is seted up and is used for inserting the inflation hole of briquetting, briquetting and inflation hole interference fit, and each side of briquetting outer wall is equallyd divide respectively with the each side inner bore wall laminating in inflation hole, has seted up the exhaust hole on the briquetting. When the pressing block is pressed into the expansion hole, the outer wall of each side of the pressing block is respectively attached to the inner hole wall of each side of the expansion hole, so that the connection stability between the pressing block and the sleeve is improved, the wall of the sleeve is completely propped open, all the annular groove teeth on the sleeve are completely pressed and embedded into the hole wall of the process hole, and the whole sealing effect and the fixing strength of the pressing block are greatly improved.)

1. The utility model provides a pressure formula hydraulic pressure end cap that rises for shutoff fabrication hole, includes fabrication hole and end cap body (1), end cap body (1) includes sleeve (2) and briquetting (3), the periphery of sleeve (2) is equipped with a plurality of annular groove teeth (4), expansion hole (5) that are used for inserting briquetting (3) are offered to the one end of sleeve (2), briquetting (3) and expansion hole (5) interference fit, its characterized in that: the outer wall of each side of the pressing block (3) is respectively attached to the inner hole wall of each side of the expansion hole (5), and the pressing block (3) is provided with an exhaust hole (6).

2. The pressure expansion type hydraulic plug for plugging a fabrication hole according to claim 1, wherein: the other end of the sleeve (2) is provided with a first chamfer (7), and the slope surface of the first chamfer (7) faces the orifice of the process hole.

3. The pressure expansion type hydraulic plug for plugging a fabrication hole according to claim 1, wherein: the outer wall of the pressing block (3) is provided with an inclined surface (8), and the inclined surface (8) is arranged towards the orifice of the expansion hole (5).

4. The pressure expansion type hydraulic plug for plugging a fabrication hole according to claim 1, wherein: one end of the pressing block (3) is provided with a second chamfer (9), and the slope surface of the second chamfer (9) is arranged towards the orifice of the expansion hole (5).

5. The pressure expansion type hydraulic plug for plugging a fabrication hole according to claim 1, wherein: the depth of the expansion hole (5) is more than or equal to the length of the pressing block (3).

6. The pressure expansion type hydraulic plug for plugging a fabrication hole according to claim 1, wherein: the sleeve (2) and the pressing block (3) are both made of hard stainless steel or aluminum alloy materials.

Technical Field

The invention relates to the technical field of valve block machining processes, in particular to a pressure expansion type hydraulic plug for plugging a fabrication hole.

Background

The hydraulic valve block is a common hydraulic device, and a plurality of jacks are arranged on the outer wall of the hydraulic valve block and used for inserting control valves, so that integration of the control valves is realized.

In the process of manufacturing the hydraulic valve block, a fabrication hole needs to be arranged for assisting in the processing of the hydraulic valve block, and after the hydraulic valve block is processed, in order to avoid the influence of the fabrication hole on the sealing performance of the hydraulic valve block, the fabrication hole needs to be sealed and plugged by a plug.

At present, common plugging modes in the prior art include a ball-expansion plug, a plug with a sealing gasket and a conical plug matched with a sealant. Meanwhile, the installation procedures of the plug with the sealing gasket and the conical plug matched with the sealant are complex, and the sealing performance of the plug is greatly influenced by installation proficiency, so that the plug is most commonly expanded by a ball. For example, chinese patent No. CN203868596U discloses a plugging device, which includes a workpiece hole, a ball-expansion-type high-pressure plug, the ball-expansion-type high-pressure plug includes a sleeve for being pressed into the workpiece hole and a steel ball for being squeezed into the sleeve, and the sleeve is provided with annular groove teeth on its periphery. The scheme utilizes the principle of pressure expansion to enable the radial expansion of the plug to be more compact in combination with the workpiece hole, and the sealing effect is better.

However, the surface of the steel ball which is extruded and attached to the inner wall of the sleeve is only the middle position of the steel ball, so that on one hand, the connection between the steel ball and the sleeve is unstable, on the other hand, the radial expansion degree of the plug is low, the reliability of plugging is affected, and after the hydraulic valve block works for a long time, the problem of sealing failure is easily caused.

The invention provides a technical scheme to solve the problems that the connection between the steel ball and the sleeve is unstable and the sealing failure is easy to occur.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a pressure expansion type hydraulic plug for plugging a fabrication hole.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a pressure formula hydraulic pressure end cap that rises for shutoff fabrication hole, includes fabrication hole and end cap body, the end cap body includes sleeve and briquetting, telescopic periphery is equipped with a plurality of annular groove teeth, the inflation hole that is used for inserting the briquetting is offered to telescopic one end, briquetting and inflation hole interference fit, each side outer wall of briquetting is equallyd divide do not with the each side interior pore wall laminating in inflation hole, the exhaust hole has been seted up on the briquetting.

Through adopting above-mentioned technical scheme, put into the fabrication hole with the sleeve earlier, put into the inflation hole with the briquetting again, start the drift with the briquetting to the downthehole impact of inflation, because each side outer wall of briquetting is equallyd divide and is do not laminated with each side inner hole wall in the inflation hole, along with the air of the briquetting in the sleeve of impressing can influence the impressing of briquetting, can discharge the air in the sleeve through the exhaust hole, the briquetting can be pressed into the inflation hole smoothly, simultaneously, because be interference fit between briquetting and the inflation hole again, vertically extrude the briquetting, make the sleeve produce radial expansion, the peripheral annular groove tooth of sleeve is impressed low hardness fabrication hole material relatively, thereby realize the sealed purpose of no leakage. When the pressing block is pressed into the expansion hole, the outer wall of each side of the pressing block is respectively attached to the inner hole wall of each side of the expansion hole, on one hand, the connection stability between the pressing block and the sleeve is improved, on the other hand, the wall of the sleeve is completely expanded, and all the annular groove teeth on the sleeve are completely pressed and embedded into the hole wall of the process hole, so that the whole sealing effect and the fixing strength of the hydraulic valve block are greatly improved, the connection between the sleeve and the process hole is more stable, the plugging is more reliable, the sealing performance is stronger, and the problem of sealing failure after the hydraulic valve block works for a long time is solved.

Preferably, the other end of the sleeve is provided with a first chamfer, and the slope surface of the first chamfer faces the orifice of the process hole.

By adopting the technical scheme, the end of the sleeve provided with the first chamfer is inserted into the technical hole firstly, so that the sleeve can be more conveniently inserted into the technical hole.

Preferably, an outer wall of the compact is provided as an inclined surface disposed toward an orifice of the expansion hole.

Through adopting above-mentioned technical scheme, the setting on inclined plane makes the briquetting have certain tapering, and the one end of briquetting need not can insert the sleeve through the extrusion, can carry out the location before the extrusion to the briquetting on the one hand, makes things convenient for impressing of briquetting, and on the other hand can prevent the briquetting and the phenomenon of hindering the people that flies out in extrusion process.

Preferably, one end of the pressing block is provided with a second chamfer, and the slope surface of the second chamfer is arranged towards the orifice of the expansion hole.

Through adopting above-mentioned technical scheme, the one end of seting up the second chamfer on the briquetting inserts the inflation hole earlier, and the one end of briquetting need not to insert in the sleeve through the extrusion.

Preferably, the depth of the expansion hole is equal to or greater than the length of the compact.

By adopting the technical scheme, when the pressing block is completely inserted into the expansion hole, one end face of the pressing block is flush with the orifice position of the expansion hole, and the flatness of the outer surface of the hydraulic valve block is ensured.

Preferably, the sleeve and the pressing block are both made of hard stainless steel or aluminum alloy materials.

By adopting the technical scheme, the hard stainless steel and the aluminum alloy have high hardness and are not easy to rust, and the service life of the plug body is prolonged. And the aluminum alloy material can be oxidized together with the blocked material, so that color difference is avoided.

Compared with the prior art, the invention has the beneficial effects that:

the utility model provides a pressure expansion formula hydraulic pressure end cap for shutoff fabrication hole, the vertical briquetting that extrudees makes the sleeve produce radial expansion, the peripheral annular groove tooth of sleeve is impressed the relative low rigidity fabrication hole material, thereby realize the sealed purpose of no leakage, when the briquetting is impressed in the inflation hole, each side outer wall of briquetting is equallyd divide and is laminated with each side inner hole wall of inflation hole respectively, on the one hand, the stability of being connected between briquetting and the sleeve has been promoted, on the other hand the telescopic section of thick bamboo wall is strutted completely, all annular groove teeth on the sleeve are pressed in embedding the pore wall of fabrication hole completely, great increase its holistic sealed effect and fixed strength, the connection between sleeve and the fabrication hole is more stable, the shutoff is more reliable, the leakproofness is stronger, prevent to appear the problem of sealing failure after hydraulic valve piece is through long-time work.

Drawings

FIG. 1 is a schematic overall structure diagram according to a first embodiment;

FIG. 2 is a schematic structural view of a compact according to the first embodiment;

FIG. 3 is a schematic structural diagram of a sleeve according to a first embodiment;

FIG. 4 is a schematic view of the overall structure of the second embodiment;

FIG. 5 is a schematic structural view of a briquette in the second embodiment;

fig. 6 is a schematic structural view of a sleeve according to a second embodiment.

Reference numerals: 1. a plug body; 2. a sleeve; 3. briquetting; 4. annular groove teeth; 5. expanding the hole; 6. an exhaust hole; 7. a first chamfer; 8. an inclined surface; 9. and (7) second chamfering.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows: a pressure expansion type hydraulic plug for plugging a fabrication hole is shown in figures 1-3 and comprises the fabrication hole and a plug body 1, wherein the plug body 1 comprises a sleeve 2 and a pressing block 3, the sleeve 2 and the pressing block 3 are both made of hard stainless steel materials or aluminum alloy materials and accord with European Union RoHs instructions (2002/95/EC).

The outer wall of briquetting 3 sets up to inclined plane 8, and the inclined plane is arranged towards the drill way of inflation hole 5, and briquetting 3 can be the shape such as round platform or trapezoidal body, uses briquetting 3 to adopt the round platform shape as the example in this embodiment, has seted up exhaust hole 6 on the briquetting 3, and exhaust hole 6 vertically runs through two end circles of round platform form briquetting 3.

The peripheral integrated into one piece of sleeve 2 has a plurality of annular groove teeth 4, and the inflation hole 5 that is used for inserting briquetting 3 is offered to the one end of sleeve 2, and inflation hole 5 adopts the round platform shape similar with briquetting 3, briquetting 3 and inflation hole 5 interference fit, and the degree of depth more than or equal to briquetting 3's of inflation hole 5 length, and first chamfer 7 has been offered to the other end of sleeve 2, and the angle of first chamfer 7 is 45, and the domatic drill way towards the fabrication hole of first chamfer 7 arranges.

The working principle is as follows: firstly, one end of a sleeve 2 provided with a first chamfer 7 is placed into a process hole, so that the sleeve 2 is more conveniently inserted into the process hole, then one end of a base circle with relatively smaller diameter on a circular truncated cone-shaped pressing block 3 is placed into an expansion hole 5, one part of the pressing block 3 can be inserted into the sleeve 2 without being extruded, the pressing block 3 is positioned before being extruded, a punching head is conveniently used for punching the pressing block 3 subsequently, the phenomenon that the pressing block 3 flies out and hurts people in the extrusion process is prevented, the punching head is started, force is acted on one end of the base circle with relatively larger diameter on the circular truncated cone-shaped pressing block 3, the pressing block 3 impacts towards the inside of the expansion hole 5, because the expansion hole 5 adopts a circular truncated cone shape similar to the pressing block 3, the pressing block 3 is in interference fit with the expansion hole 5, the outer walls of all sides of the pressing block 3 can be respectively attached to the inner hole walls of all sides of the expansion hole 5, and no, along with the briquetting 3 the air of impressing in the sleeve 2 can influence the impressing of briquetting 3, can discharge the air in the sleeve 2 through exhaust hole 6, briquetting 3 can be pressed into expansion hole 5 smoothly, when the drift supports on the valve block, briquetting 3 can't continue to get into expansion hole 5, at this moment, briquetting 3 has been located expansion hole 5 completely, and the stress end of briquetting 3 keeps flat with the drill way position of expansion hole 5 and the surface of valve block, has guaranteed the roughness on valve block surface. Meanwhile, the pressing block 3 is in interference fit with the expansion hole 5, the pressing block 3 is longitudinally extruded, the sleeve 2 is radially expanded, and the annular groove teeth 4 on the periphery of the sleeve 2 are pressed into the process hole material with relatively low hardness, so that the purpose of leakage-free sealing is achieved. When the pressing block 3 is pressed into the expansion hole 5, the outer wall of each side of the pressing block 3 is respectively attached to the inner hole wall of each side of the expansion hole 5, on one hand, the connection stability between the pressing block 3 and the sleeve 2 is improved, on the other hand, the wall of the sleeve 2 is completely expanded, all the annular groove teeth 4 on the sleeve 2 are completely pressed and embedded into the hole wall of the process hole, the integral sealing effect and the fixing strength of the process hole are greatly improved, the connection between the sleeve 2 and the process hole is more stable, the plugging is more reliable, the sealing performance is stronger, and the problem of sealing failure after the hydraulic valve block works for a long time is solved.

Example two: compared with the first embodiment, the second embodiment is different in that: as shown in fig. 4 to 6, the outer wall of the compact 3 is not provided with the inclined surface 8, and the compact 3 may be in a cylindrical shape or a rectangular parallelepiped shape, for example, the compact 3 is in a cylindrical shape in this embodiment. A second chamfer 9 is formed in one end of the pressing block 3, the angle of the second chamfer 9 is 45 degrees, and the slope of the second chamfer 9 is arranged towards the orifice of the expansion hole 5.

When the pressing block 3 needs to be inserted, one end of the pressing block 3, which is provided with the second chamfer 9, is firstly inserted into the expansion hole 5.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.